Brake throw measuring device



March 14, L GRAHAM 1,901,292

' BRAKE THROW MEASURING DEVICE Filed July 9, 1928 A TTORNEK Patented Mar. 14, 1933 opposite that LEON I. GRAHAM, OF

TESTER, INCL, OESOUTH BEND,

BRAKE 'rnaow mmsnnme Davies A piication filed 311117 9,

The object of my invention is to provide a device for measuring of movement on the operative stroke of an automobile brake pedal or the like, the particular use contemplated for the device be ing in connection with the testing of automobile brakes by machines which are'used to rotate the wheels of the automobile and serve to indicate the amount of resistance when the brakes are applied. By means of my invention, the brake pressure may be definitely related to the extent of applica tion of the brakes, as shown by the movement of the brake pedal.

Other objects and advantages of the invention will be apparent as it is better understood from the following description, which, taken in connection with the accompanying drawing, discloses apreferredeinbodiment thereof.

Referring to the drawing,

Fig. 1 is an elevational view of a device in which my invention is embodied, illustrating the use thereof;

Fig. 2 is a plan View ofthe device;

Fig. 3 is a side view;

Fig. 4 is a bottom plan view, apart of the casing being broken away in this View for convenience in illustration; and

Fig. 5 is a side view taken from the side shown in Fig. 3, part of the casing being also broken away for clearness in this view.

Upon said drawing, illustrating the best manner in which I have thus far contemplated applying the principles of my invention, the reference character 21 indicates a casing in which there are mounted two relatively movable bars 22 and 23, the latter being movable and the former having a handhold 24 thereon and a lower end part 25 adapted to rest on the floor 26 of the car, this end part being preferably pointed to prevent slippage on the floor board. Said bar 22 and the casing 21 form a unit which serves as a brace or support whereby the device may be held in position adjacentthe brake pedal as will later app-ear. The casing 21 is attached to the members 24 and 22 cmceeo, ILLINOIS, nssrenon re the throw or extent Fig. 3. f r

fhe bar '23 has aifightangi lower end part 27 hichisadapted to bearranged'beneathithebmke rf 2822f ear and the ,s'

ember 23 is conneet by pe 'e def-sa asprmg" 2'9 with the casing 21, said spring tending to draw said member 23 upwardly and to resist "till6 downward movement there r edu'ciedby't ie ak r e m nes laterally turned portion, or foot "against the fmem'ber 27 thelatter beingjdisposed outside thecasing21 and being adapted in then'p position, to engagefthe flowerend of said zero, positi on of said bar 23. The casing has an pe g, or t,.i 1... he p r, Pa i. ear, d, liec t s id op n fl h B terionof the casingis graduated, as indicasing, thereby detrminingthe normal, or

cated at32iin Fig.1 .The bai 23 rnayjbeUfZ O this opening and isadapted seen through "to have an indicator point, "as shown at ,33, which is normally disposed at the zero point ofthe indicator.

, the device! applied as in 15 .15 1 and with the fixed parts'2l, 22 thereof serving as a brace, downwardly when the pressed, thus causlng the bar 23 will f be moved brake pedal is dethe indicator; point i .33 on said: bar to indicate the extent of the, 0

brake throw, the indicator'being'preferably' graduated in ,inches' so "that the brakeresistancefproduced by applic'ation of the brake may be relatedto the number of inches that 7 the. brake pedal, is depressed. If the properratio is not foundto exist, adjustment may be made-so that the brake throw willbear a predeterminedrelation to the action of the brakes.

It is of its attendant; advantages. will be understood from' the foregoing description, and it ,.-will be -apparent that variousfchanges may be madein; the'iform, constructionand ar- 95 rangemen't of the-parts, witho-ut departing fronivth'e spirit and 'scop'eyof the invention, or sacrificing all of its material advantages, the 'form hereiribefo-re described being merely a preferred embodiment thereof. 10o

V nnnnrx-cownnnv 5 iii-cairn INDIANA, A cortronarrorr or"DELAWARE.

.by mean of screws swims-as shownin" thought thattlie invention and many '9 I I claim:

1. A device for measuring the throw of an automobile brakepedal or the like comprising a brace bar arrangeable alongside the pedal with one end engaging the floor of the automobile, a movable member carried by said brace bar and having a part 7 engageable by' the underside of the pedal wherebyisaid membercmay bemoved correspondingly. to the pedal throw, said-brace bar having graduations thereon to show the extent of movement of said fmember fcausedzby depression of the pedal, and means affording a yielding connection between said bracebar and said movable member.

ing graduations adjacent said opening and said last-mentioned bar having an indicator point thereon, the movement of which may be observed through said opening with reference to said graduations. V In witness whereof, :I hereunto subscribe my name't'o this specification.

LEON L. GRAHAM.

2. A device for measuring the throw of an automobile brake pedal orthe like comprising a. brace bar arrangeabjle alongside the pedal with one end engaging the floor ,ofthe automobile, a movable member carried by said brace bar and having a part en- .gageable by the underside of the pedal whereby said member may be moved correspondingly to the pedal throw, said brace bar having graduations thereon to show the extent of movement of said member caused by depression of the pedal anda spring'between said brace bar and said movablemember tending to draw said member toward normal or zero position.

3; A device for measuring the throw of anautomobilebrake'pedal or the like, comprising two "adjacent relatively movable bars, .one having a handheld and a part adapted to restvon the floor of the automobile and'the othe'r'having thereon a member adapted to be engaged and moved in the operation ofthe pedal, one of said barshaV- ing a pointer and-the other bar havinggrad- -uations thereon for indicating the amount :of. relative movement between said bars caused by depression of -the,pedal, and

:means yielding connecting said bars.

V 4. A device for measuring the throw of an automobile brake pedal or the like comprising two adjacent relatively movable ibars,

onehavi nga hand-hold and a part'adapted to rest on 'thefioor o'f'the automobile and the other having thereon a member adapted to be engaged and movedinthe operation of the pedal one ofsaid bars having'apointer and the other bar having 'gra'duations thereon for indicating "the-amount of relativemovement between said bars, and a return-spring con nectingsaid bars. 1

A device for measuringthe throw of an 7 ai'itomobilebrake pedal or the like comprising two adjacent relatively-movable bars,

one having aihan'd hold and a part 1 adapted to rest on the floorof-theautomobile and the other h'aving thereon' a member adapted to be moved in the operation ofthepedal, means yieldingly connecting said-bars and a casing in which said barsareenclosed, said casing having an opening therein and hav- 

